SFTP Lite Server is a Java based SFTP server with very minimal features, based on the Jaramiko SSH libraries. The SFTP server only have a single user and password and only one home directory. It supports the minimal features of SFTP.
JRemoteFS is a lite, generic framework for access to remote filesystem integration into your Java application. Currently FTP and SFTP are supported. JRemoteFS was developed for JAlbum and now released as a seperate package. For more info, see http://joos